User Manual
SG30KU/SG36KU
PV Grid-Connected Inverter
SG30KU_SG36KU-UEN-Ver13-201506 Version: 1.3
About This Manual
This manual is for the inverters SG30KU and SG36KU. These inverters are
grid-connected, transformer-less, robust and of high conversion efficiency. The
device will bring you profit from PV power system.
Aim
The manual contains information about the inverter, which will provide you
guidelines to connect the inverter into the PV power system and operate the
inverter.
Related Documents
The manual cannot include complete information about the PV system. You will get
the additional information about other devices at www.sungrowpower.com or via
webpage of device manufacturer.
Target Group
The manual is targeted to technical personnel who is responsible for inverter
installation and commissioning in the PV power system and inverter owner who will
perform daily LCD operation.
How to Use This Manual
Read the manual and other related documents before any work with the inverter.
Documents must be stored carefully and available at all times.
The contents of the manual will be periodically updated or revised due to the
product development. It is probably that there are changes of manual in
subsequent inverter edition. The latest manual can be acquired via visiting the web
page www.sungrowpower.com.
I
Symbols Explanation
Important instructions contained in this manual should be followed during
installation, operation and maintenance of the inverter. And they will be highlighted
by the following symbols.
DANGER indicates a hazard with a high level of risk which, if not avoided,
will result in death or serious injury.
WARNING indicates a hazard with a medium level of risk which, if not
avoided, could result in death or serious injury.
CAUTION indicates a hazard with a low level of risk which, if not avoided,
could result in minor or moderate injury.
NOTICE indicates a situation which, if not avoided, could result in
equipment or property damage.
NOTE indicates additional information, emphasized contents or tips to
help you solve problems or save time.
II
Symbols on the Inverter Body
This symbol indicates that you should wait at least 5 minutes after
disconnecting the inverter from the utility grid and from the PV input
before touching any inner live parts.
Hot surface! In order to reduce the risk of burns, do not touch the hot
surface when the device is running.
Look over the user manual before any operation on the inverter!
The installation and service of the inverter unit can only be
performed by qualified personnel.
III
Contents
1 Safety Instructions ................................................................... 1 1.1 IMPORTANT SAFETY INSTRUCTIONS .............................................................. 1 1.2 Arc Fault Detection (AFD) ................................................................................... 5 2 Product Introduction ............................................................... 6 2.1 Intended Usage ...................................................................................................... 6 2.2 Product Description.............................................................................................. 7 2.2.1 Product Appearance ................................................................................................7 2.2.2 Dimensions of Inverter ............................................................................................8 2.2.3 LCD Display Panel......................................................................................................8 2.2.4 DC Switch .....................................................................................................................9 2.3 Technical Description ........................................................................................... 9 2.3.1 Principle Description................................................................................................9 2.3.2 Functions Description .......................................................................................... 10 2.3.3 Derating ..................................................................................................................... 11 3 Installation Flow .....................................................................13 4 Unpacking and Storage .........................................................15 4.1 Unpacking and Inspection .............................................................................. 15 4.2 Available Versions............................................................................................... 16 4.3 Identifying Inverter ............................................................................................ 16 4.4 Delivery Contents ............................................................................................... 18 4.5 Storage of Inverter ............................................................................................. 19 5 Mechanical Installation .........................................................20 5.1 Selecting Installation Location ...................................................................... 20 5.2 Moving Inverter to Installation Site ............................................................. 22 5.3 Installing the Inverter ........................................................................................ 23 5.3.1 Installing on Concrete Wall ................................................................................. 24 5.3.2 Installing on Metal Frame.................................................................................... 25 IV
5.3.3 Installing on the Floor .......................................................................................... 27 5.3.4 Horizontally Installing .......................................................................................... 28 6 Electrical Connection ............................................................. 30 6.1 Connection Conduit Entries............................................................................ 30 6.2 Combiner Unit Description ............................................................................. 31 6.3 Connecting Inverter to AC Grid ..................................................................... 32 6.3.1 AC Side Requirements .......................................................................................... 32 6.3.2 Grid Connection ..................................................................................................... 33 6.4 Connecting Inverter to PV Arrays.................................................................. 35 6.4.1 PV Inputs Configuration ...................................................................................... 36 6.4.2 PV Connection Procedures ................................................................................. 38 6.5 Grounding the Inverter ..................................................................................... 41 6.5.1 Grounding System Overview............................................................................. 41 6.5.2 Second Protective Earth Terminal .................................................................... 42 6.6 Communication Connection .......................................................................... 43 6.6.1 Communication Overview.................................................................................. 43 6.6.2 Communication System ...................................................................................... 44 6.6.3 RS485 Communication Connection................................................................ 46 6.6.4 Configurable Dry Contact ................................................................................... 48 6.6.5 RS485-NET Converting Card (Optional) ......................................................... 49 7 Commissioning ...................................................................... 50 7.1 Inspection before Commissioning ............................................................... 50 7.2 Commissioning Procedure .............................................................................. 50 8 Disconnecting, Dismantling and Disposing the Inverter .... 53 8.1 Disconnecting the Inverter ............................................................................. 53 8.2 Dismantling the Inverter .................................................................................. 54 8.3 Disposing the Inverter ...................................................................................... 56 9 Troubleshooting and Maintenance ...................................... 57 9.1 Troubleshooting .................................................................................................. 57 9.1.1 Troubleshooting of LED Indicator .................................................................... 57 9.1.2 Arc Fault Detection Self-test Fault ................................................................... 58 V
9.1.3 DC Arc Fault .............................................................................................................. 58 9.1.4 Troubleshooting of Faults in LCD Screen ...................................................... 58 9.2 Maintenance ........................................................................................................ 63 9.2.1 Routine Maintenance ........................................................................................... 63 9.2.2 Maintenance Instruction ..................................................................................... 63 9.3 Contact Sungrow Service ................................................................................ 66 10 Operation of LCD Display ......................................................67 10.1 Description of Button Function..................................................................... 67 10.2 Inverter Menu Structure................................................................................... 68 10.3 Main Screen .......................................................................................................... 69 10.4 Adjust Contrast .................................................................................................... 70 10.5 Detailed Running Information....................................................................... 71 10.6 History Records ................................................................................................... 72 10.6.1 Running Information Records ......................................................................... 72 10.6.2 Fault Records ......................................................................................................... 72 10.7 Start and Stop Inverter ..................................................................................... 73 10.8 Input Parameter Settings Password............................................................. 73 10.9 System Parameters Setting ............................................................................. 74 10.9.1 Time Setting ........................................................................................................... 74 10.9.2 Energy Deviation Adjustment......................................................................... 74 10.9.3 Load Default .......................................................................................................... 75 10.9.4 Firmware Version.................................................................................................. 75 10.10 Running Parameters Setting .......................................................................... 76 10.10.1 Main Menu of Run-param .............................................................................. 76 10.10.2 Reactive Power Regulation ............................................................................ 77 10.10.3 Save P/Q-set ........................................................................................................ 77 10.11 Protective Parameters Setting ....................................................................... 78 10.12 Communication Parameters Setting ........................................................... 81 10.13 Advanced Parameters Setting ....................................................................... 81 10.13.1 PVS Detect Settings .......................................................................................... 81 10.13.2 AFD Settings........................................................................................................ 82 VI
11 Appendix ................................................................................ 84 11.1 Technical Data ...................................................................................................... 84 11.2 Grid Over-/Under-voltage Parameter .......................................................... 86 11.3 Grid Over-/Under-frequency Parameter..................................................... 86 11.4 P-Q Curve ............................................................................................................... 86 11.5 Automatic Power Derating .............................................................................. 87 11.5.1 Temperature-related Power Derating .......................................................... 87 11.5.2 Input Voltage-related Power Derating ........................................................ 88 11.6 Exclusion of Liability .......................................................................................... 89 11.7 About Us ................................................................................................................ 90 VII
1 Safety Instructions
1.1 IMPORTANT SAFETY INSTRUCTIONS
SAVE THESE INSTRUCTIONS. This manual contains important instructions for
SG30KU and SG36KU inverter that shall be followed during installation and
maintenance of the inverter.
The SG30KU and the SG36KU have been designed and tested strictly according to
the international safety regulations. As electrical and electronic equipment, safety
instructions related to them must be complied with during installation,
commissioning, operation and maintenance. Incorrect operation or work may result
in damage to:
y The life and well-being of the operator or a third party
y The inverter and other properties that belong to the operator or a third party
Therefore, the following safety instructions must be read and always kept in mind
prior to any work. All detailed work-related safety warnings and notes will be
specified at the critical points in corresponding chapter.
All installation and electrical work must only be performed by qualified
personnel. They have
y been trained specially;
y already completely read through and understood the manual and other
related documents;
y been familiar with safety requirements for electrical system.
Technical personnel mentioned above may perform the following work:
y Install the inverter onto the wall
y Connect the inverter into the PV power system
y Connect other devices into the PV power system
y Commission the inverter
y Maintain and service the inverter
1
1 Safety Instructions
User Manual
Before Installation
There is a risk of injury due to improperly handling the device!
y Always follow the instructions contained in the manual when moving and
positioning the inverter.
y The weight of the equipment can cause injuries, serious wounds, or bruise
if improperly handled.
During Installation
Prior to installing the inverter onto the wall, it is crucial to make certain that the
inverter is not electrically connected.
System performance loss due to bad ventilation!
The equipment requires good quality ventilation during operation. It is
essential to keep the unit upright and nothing covering the heat sink in
order to ensure that the equipment interior is well cooled down.
During Electrical Connection
Lethal voltage exists!
PV arrays will produce electrical energy when exposed to sunlight and thus
can create an electrical shock hazard.
y Wiring of the PV arrays should only be performed by qualified personnel.
All cables must be firmly attached, undamaged, properly insulated and
adequately dimensioned.
2
User Manual
1 Safety Instructions
During Inverter Operation
Do not open the enclosure when the inverter is under voltage. There is an unlikely
but possible risk of explosion in very specific cases of fault. The housing will protect
persons and property from such an explosion, only if it is correctly sealed.
There is a risk of burn!
Prevent from touching device hot parts (such as heat sink) during operation.
Only LCD display panel and DC switch can be touched during inverter
operation.
Maintenance and Service
There is a risk of inverter damage or personnel injury due to incorrect
service work!
Always keep in mind that the inverter is power supplied by dual power
source: PV arrays and utility grid.
Before any service work, you should obey the following procedures.
y Disconnect inverter from the utility grid side first and then PV arrays;
y Wait at least ten minutes until the inner capacitors discharge completely;
y Verify that no voltage or current present with appropriate testing device.
Keep unrelated person away!
A temporary warning sign and barrier must be posted to keep non-related
person away for any period while performing electrical connection and
service work.
y Any fault that may impair the inverter safety functions must be repaired
immediately before the inverter is restarted.
y Inverter contains no owner serviceable parts inside. Please contact local
authorized personnel if any service work is required.
3
1 Safety Instructions
User Manual
Servicing of the device in accordance with the manual should never be
undertaken in the absence of proper tools, test equipment or more
recent revision of the manual which is clearly and thoroughly
understood.
There is a risk of inverter damage if it is improperly serviced.
Use only accessories and spare parts approved by the inverter
manufacturer. Never modify the inverter or other components of the
inverter. Otherwise it will cause loss of any or all warranty rights.
There is a risk of inverter damage due to electrostatic discharge!
The printed circuit boards contain components sensitive to electrostatic
discharge. Wear a grounding wrist band when handling the boards. Avoid
unnecessary touch with the boards during replacement.
Others
The selected country settings can be changed by qualified personnel only!
Unauthorized modification to country settings should be prohibited.
Alternation of the country settings may cause a breach of the
type-certificate marking.
All safety instructions, warning labels and nameplate on the inverter body:
y Must be clearly visible;
y Must not be removed, covered and pasted.
4
User Manual
1 Safety Instructions
These regulations should also be followed:
y The regulations related to the electricity fed into grid;
y The safety instructions related to PV arrays;
y The safety instructions related to other electrical device.
1.2 Arc Fault Detection (AFD)
According to the 2011 National Electric Code (NEC) and 2013 Canadian Electric Code
(CEC), if the DC voltage of a photovoltaic system is higher than 80V and the system
is on a building or its DC conductors enter a building, it must be equipped with a
special device that can detect a DC arc fault and interrupt the circuit. This
functionality is commonly referred to as a DC AFDI.
The inverter assures to detect the arc fault defined by UL1699B.
The DC ARC-Fault circuit is for series arcing faults or a type 1 device.
The SG30KU and SG36KU inverter’s DC Arc Fault Detection (AFDI) function is based
on the Digital Signal Processor (DSP).
The DC AFD module performs a self-test every time the inverter is started-up or you
can manually activate AFD function on the LCD screen, the result will show on the
LCD screen, which can only be pass or fail. If it fails, the corresponding fault code will
be displayed and the inverter will not connect to the grid. If it passes, the inverter
connects and operates normally.
If a DC arc fault is detected during normal operations, the inverter will disconnect
from the AC grid. The DC arc fault is displayed on the inverter’s LCD screen and the
inverter is powered off until the fault is manually removed.
5
2 Product Introduction
2.1 Intended Usage
SG30KU and SG36KU (They will be referred to as inverter hereinafter unless
otherwise specified) which are a 3-phase string inverter without transformer, are
crucial unit between the PV strings and utility grid in the PV power system.
Inverter is dedicated to converting direct current power generated by the PV
modules into alternating current, which conforms to parameters of local utility grid,
and feeds it into the utility grid. The intended usage of the inverter is illustrated in
Fig. 2-1.
Fig. 2-1 Application of the inverter of the PV Power System
Item
Description
A
PV strings
B
C
D
Inverter
Metering device
Utility grid
Note
Monocrystalline silicon; polycrystalline silicon and
thin-film without grounding of protection class II
SG30KU, SG36KU
Mter cupboard with power distribution system
4W-Y Grid or 3W-Δ Grid
Any other or additional usage is not permitted except the intended usage.
Inverter may only accept PV modules with Protection Class II as its input.
Inverter may only be connected to utility grid via distribution board. Local
loads (home appliance, lights, motor loads, etc.) cannot be connected
between inverter and AC circuit breaker on the distribution board.
Additionally, the unit is intended for fixed installation. Located on a part
that is not removable without impairing the operation of the unit.
6
User Manual
2 Product Introduction
2.2 Product Description
2.2.1 Product Appearance
Fig. 2-2 Product Components Description
Item
1
2
3
Name
Description
LCD display
panel
Connection
openings
Inverter operation data viewing and parameters
configuration can be performed via the LCD display panel.
Connection openings with plastic threaded plugs for
connecting conduits.
The handles are designed for holding the unit when
transporting, installing or servicing.
Handles
5
6
7
Second
PE
Terminals
Air outlet
Mounting ear
Fans
8
DC switch
9
10
Air inlet
AC switch
4
Second protective earth terminals as specified in EN 50178.
Exit of hot air during the inverter operation.
It is used for hanging inverter onto the backplate.
There are four fans to perform controlled forced-air cooling.
During normal operation it is in “ON” state. It can shut down
the inverter immediately in “OFF” position.
Entrance of cool air.
Serviced as an automatic overcurrent device.
7
2 Product Introduction
User Manual
2.2.2 Dimensions of Inverter
Fig. 2-3 Outline Dimensions of Inverter (unit: mm)
2.2.3 LCD Display Panel
As a human-computer interaction interface, LCD display panel comprises LED
indicators, buttons and LCD display screen on the front panel of the inverter.
y LEDs indicate the working status of the inverter
y The current running information shown on the LCD display
y Fault records shown on the LCD display
y Inverter configuration by pressing the buttons
Fig. 2-4 LCD Display Panel
8
User Manual
2 Product Introduction
Tab. 2-1 LCD Display Panel Description
No.
Name
Description
1
LED
indicators
2
Buttons
3
LCD
screen
“RUN” and “FAULT”. Inverter current state can be known from the
two indicators. Detailed definition is shown in Tab. 2-2.
Navigate in the LCD menu, set values and so on. Detailed
function is shown in Tab. 10-1.
LCD screen can display current state of inverter, current running
information, history information and parameters to be set.
Tab. 2-2 Description of LED Indicator Status
LED Status
“RUN”: on;
“FAULT”: off
“RUN”: off;
“FAULT”: on
“RUN”: off;
“FAULT”: off
Description
Inverter is feeding AC power to the utility grid.
A fault happens;
or protection function triggers.
Inverter is not energized;
or there is a communication error between DSP and LCD.
2.2.4 DC Switch
DC switch is designed for safely disconnecting the DC input current if required.
The inverter works automatically when input and output meet the requirements.
Rotating DC switch to the “OFF” position will immediately cut off the flow of DC
current.
Rotate the DC switch to the “ON” position, before restarting the inverter.
2.3 Technical Description
2.3.1 Principle Description
The principle design of transformer-less and grid-connected inverters are illustrated
below.
They are equipped with MPPTs for two DC inputs to ensure that the maximum
power can be utilized even in different PV modules installation conditions.
Inversion circuit converts DC power into AC power, which will be fed into the utility
grid via five core terminals. Protective circuits are designed to guarantee inverter
safe operation and human safety.
9
2 Product Introduction
User Manual
A DC switch is integrated for safe disconnection of DC current. The inverter provides
standard interface RS485 for communication. Inverters are also provided running
records display and parameters configuration via human-computer interface – LCD
display panel.
We provide 3 options of inverters for the users, the S0, S1 and S2 versions are for
SG30KU, the S1 and S2 versions are for SG36KU.
Fig. 2-5 Main Circuit Diagram of SG30KU and SG36KU
*Image shown here is indicative only. Actual product you receive may differ.
2.3.2 Functions Description
Inverter functions can be grouped as the following:
y Conversion function
Inverter converts the direct current power into alternating current power, which
conforms to the grid requirement of its installation country.
y Data storage and display
Inverter stores essential data including running information and fault records,
and displays them on integrated LCD display.
y Parameters configuration
Inverter provides various parameters configuration for optimal operation.
y Communication interface
10
User Manual
2 Product Introduction
Standard RS485 interface for connecting other monitoring devices into the PV
system is included.
y Arc Fault Detection
If a DC arc fault is detected during normal operations, the inverter will disconnect
from the AC grid.
y Protection functions
− Short circuit protection
− Insulation resistance to ground surveillance
− Inverter output voltage surveillance
− Inverter output frequency surveillance
− Residual current protection
− DC component of AC output current surveillance
− Anti-islanding phenomena protection
− Ambient temperature surveillance
− DC over-voltage protection
− Over current protection
− Power module over-temperature protection
2.3.3 Derating
Derating the output power is a way to protect the inverter from overload and
potential faults. Inverter’s derating function can be activated in the following
scenarios:
y Grid voltage too low
y Temperature too high (Inner temperature and power modules temperature)
y Power limit setting on the inverter LCD display or remote dispatch
Power Limit Setting
User may allocate output power value of the inverter via LCD control panel or the
remote dispatch from the grid company. Under this kind of power derating, the
operating states will display on the LCD screen.
Over-temperature Derating
Power modules over-temperature may result from high ambient temperature, poor
ventilation or fault of fans. Over-temperature derating may protect the inverter as
well as the power modules against damage.
11
2 Product Introduction
User Manual
y When the modules temperature exceeds an upper limit, the inverter start to
gradually derating until the temperature decreases to normal range.
y When the inner temperature exceeds an upper limit, the inverter start to
gradually derating until the temperature decreases to normal range.
The deration lower limitation is about 33%.
If the modules temperature and the inner temperature are both exceed
the limit, the actual derating power value will be the less one.
Grid Under-voltage Derating
Once the grid voltage is in the defined range of Vgrid(Vmin…244V), the inverter will
decrease the power output.
P[Vmin…244V] = Pn × (Vgrid/277V)
Fig. 2-6 Grid Under-voltage Derating
12
3 Installation Flow
Fig. 3-1 shows the installation flow of inverter for installer. Please follow these
procedures.
Fig. 3-1 Installation Flow Chart
13
3 Installation Flow
User Manual
Tab. 3-1 Description of Installation Flow
Order
Description
Reference Chapter
1
Unpacking and inspection
Read this manual, especially the section on “safety
instruction”
Store the inverter unit if not install immediately
Choose the best installation site
Moving the inverter to installation site
Install the inverter against the chosen wall
Electrical connections include DC, AC, ground and
communication(optional)connection
Examine before commissioning
Start up inverter and configure corresponding
parameters
Troubleshooting
Section 4.1
2
3
4
5
6
7
8
9
10
14
Chapter 1
Section 4.4
Section 5.1
Section 5.2
Section 5.3
Section 6.3...6.7
Section 7.1
Section 7.2
Section 9.1
4 Unpacking and Storage
4.1 Unpacking and Inspection
The unit is thoroughly tested and strictly inspected before delivery. Damage may
still occur during shipping.
y Check the packing for any visible damage upon receiving.
y Check the inner contents for damage after unpacking.
y Check the completeness of delivery contents according to the inner packing list.
If there is visible damage to the packaging or the inner contents, or if there is
something missing, contact the unit dealer.
Do not dispose of the original packaging. It will be the best choice to store the
inverter by re-using the original packaging.
Fig. 4-1 Paper Packaging of Inverter
15
4 Unpacking and Storage
User Manual
4.2 Available Versions
According to their rated output power, the inverters can be divided into 30kW and
36kW. We provide five wiring box versions for equal output power inverters. Tab. 4-1
shows the five wiring box versions.
Tab. 4-1 Description of 30kW and 36kW models
Type
SG30-S0-VERSION
SG30_36KU-S1-VERSION
SG30_36KU-S12-VERSION
Dimensions (H×W×D):
634×875×257mm
25.0×34.4×10.1in
Weight: 65kg/143.3lbs.
Tab. 4-2 Wiring box configurations available
Type
SG30-S0-VERSION
SG30_36KU-S1-VERSION
SG30_36KU-S2-VERSION
Available Components
DC Switch
DC Input Fuses
DC Switch
DC Input Fuses
DC Surge Protection Device(SPD)
DC Switch
DC Input Fuses
DC Surge Protection Device(SPD)
AC Surge Protection Device(SPD)
AC Switch
4.3 Identifying Inverter
A nameplate is attached to one side of the inverter and the carton respectively. It
provides information on type of inverter, along with the most important
specifications, marks of certification institutions, website and serial number which is
available and identified by Sungrow.
16
User Manual
4 Unpacking and Storage
Fig. 4-2 Nameplate of Inverters
*Image shown here is indicative only. Actual product you receive may differ.
Item
Description
1
2
3
4
SUNGROW logo and product type
Technical data of inverter
Marks of certification institutions of inverter
Company name, website and origin
Tab. 4-3 Description of Icons on the Nameplate
Icon
Description
CSA mark of conformity.
The inverter is in compliance with directives of US and CAN.
Electrical shock protection mark.
Do not perform any servicing other than that specified in Electrical
Connection instructions to protect against electrical hazard.
Thermal hazard mark.
Do not touch the hot surface when the device is running.
Refer to the corresponding instructions.
17
4 Unpacking and Storage
User Manual
4.4 Delivery Contents
Fig. 4-3 Delivery Contents
Item
Name
Description
A
B
Inverter unit
Backplate
Expansion
bolts
--It is used for mounting inverter onto the wall.
Seven units. It is used for fastening backplate onto concrete
wall.
Seven units. It is used for fastening backplate onto metal
frame.
C
D
Fastener set
E
Fix screws
F
Documents
G
Jumper
cables
18
2 M4×16 screws for fix the inverter to the backplate.
Documents include quality certificate, packing list, product
test report, and inverter user manual.
Configure PV configuration in parallel mode via jumper
cables.
User Manual
4 Unpacking and Storage
4.5 Storage of Inverter
Where the inverter may not be installed immediately or inverter needs to be stored
under certain condition, store the unit as the following indications:
y The unit must be packed into original carton and desiccant must be put inside. If
the original packaging is not available, an equivalent carton which is able to
support the unit weight and size can be used.
y The packing should be sealed by adhesive tape.
y The unit must be stored in a clean and dry place to protect against dust and
moisture.
y The storage temperature should be always between -30℃ and 85℃. And the
storage relative humidity can reach 100%.
y The recommended number of stack layers is not more than 4.
y It is very important to keep the packing away from chemicals. Otherwise it will
lead to corrosion.
y During the storage time, periodically check any visible damage by rats and other
rodents. Replace the packaging if necessary.
y The packaging should be kept upright.
y After long term storage, local installer or service dept. of Sungrow should
perform a comprehensive test before connecting the inverter into PV power
system.
19
5 Mechanical Installation
5.1 Selecting Installation Location
Selecting an optimal installation location for the inverter is decisive for its operating
safety as well as its expected efficiency and service life.
y Take the load capacity of the wall into account. The wall (such as concrete wall
and metal structure) should be strong enough to hold the weight of the
inverter over a long period of time.
y Install the unit where is accessible to install, electrical connect or service.
y Do not install the unit on the wall of flammable materials.
y Do not install the inverter where contains flammable materials or flammable
gas in the vicinity of the unit installation.
y Install the unit at eye level for easily buttons operation and display read.
y It is suggested that the inverter be installed vertically or horizontally with the
bracket for good heat dissipation.
y Never install the inverter with a forward tilt, nor with a backward tilt nor even
with upside down.
20
User Manual
5 Mechanical Installation
y The inverter unit with NEMA 4X can be installed
indoors or outdoors also.
y The ambient temperature should range from
-25°C to 60°C.
y The relative humidity of the installation can
reach 100%. Moisture may result in corrosion
and damage to the internal device
components.
y Avoid exposing inverter to direct sunlight or rain or snow to extend its service
life despite the NEMA 4X protection degree. Exposure to the sun may cause
additional internal heating which will cause power reducing. Shaded site of
the building is preferred.
y Take enough space for convection into consideration during installing
multiple inverters. It is suggested that position the multiple inverters in a
staggered way if necessary.
21
5 Mechanical Installation
User Manual
y Do not install the inverter in a closed
cabinet. Otherwise, the inverter will not
operate normally. It is necessary to make
sure that hot air will be discharged by
forced ventilation.
y Do not install the inverter where children
can reach.
y Do not install the inverter in living area.
Noise can be produced during running of
inverter, which may affect your daily life.
5.2 Moving Inverter to Installation Site
If the inverter is to be installed, remove the unit from the packaging and move it to
the chosen installation site. During the moving process, the following instructions
should be obeyed.
y Always remember the weight of the inverters.
y Grasp the equipment by both hands by means of handles.
y Move the unit with the help of others or the lifting device.
y Do not release the equipment unless it has been secured to the wall firmly.
22
User Manual
5 Mechanical Installation
5.3 Installing the Inverter
Inverter is installed onto the wall by means of backplate enclosed in the packaging.
If you don’t use the supplied backplate, you may drill holes refer to its dimension
below.
Fig. 5-1 Dimensions of Backplate(unit: mm)
There are two sets of stainless fasteners supplied for attaching the backplate to
concrete wall and metal frame.
Fig. 5-2 Dimensions of Expansion Bolt Set for Concrete Wall (unit: mm)
Fig. 5-3 Dimensions of Fastener Set for Metal Frame(unit: mm)
23
5 Mechanical Installation
User Manual
5.3.1 Installing on Concrete Wall
Step 1 Remove backplate and fasteners from the packaging.
Step 2 Place the backplate onto the chosen concrete wall and adjust it until it is in a
horizontal position.
Step 3 Mark the positions to drill holes using the backplate as the template.
Step 4 Drill holes according to the marks made before.
In order to avoid electrical shock or other injury, inspect existing electronic
or plumbing installations before drilling holes.
Step 5 Attach the backplate to the wall firmly with the supplied expansion bolt set.
The torque for fastening the nut is 35 Nm.
Step 6 Assemble the cap onto the inverter for better weatherproof function.
Step 7 Lift up inverter above the backplate and then slide down to make sure that
the recesses on the back of the inverter fit perfectly together with the
backplate.
Step 8 After fit the inverter to the backplate, fasten the inverter to the backplate
with two M4×16 screws.
24
User Manual
5 Mechanical Installation
5.3.2 Installing on Metal Frame
Step 1 Remove backplate and fasteners from the packaging.
Step 2 Choose the best installation site according to above requirements. Place the
backplate onto the chosen metal frame and adjust it until it is in a horizontal
position.
Step 3 Mark the positions to drill holes by using the backplate as the template.
Step 4 Drill 6 holes at the marks you have made. If the shape of the metal frame
doesn’t fit the holes on the backplate, re-drill holes on the backplate of
appropriate position according to the chosen frame.
In order to avoid electrical shock or other injury, inspect existing electronic
or plumbing installations before drilling holes.
Step 5 Fasten the backplate against the metal frame with bolts and nuts. The
dimensions of fasteners used in the following diagram are recommended.
The torque for fastening the nut is 35 Nm.
25
5 Mechanical Installation
User Manual
Item
Description
Remark
A
B
C
D
E
F
Hexagonal socket nut
Spring washer
Washer
Hexagonal bolt
Metallic wall
Backplate
M10
M10*45
-
Step 6 Assemble the cap onto the inverter for better weatherproof function.
Step 7 Lift up the inverter above the backplate and then slide down to make sure
that the recesses on the back of the inverter fit perfectly together with the
backplate.
Step 8 After fit the inverter to the backplate, fasten the inverter to the backplate
with two M4×16 screws.
26
User Manual
5 Mechanical Installation
5.3.3 Installing on the Floor
Step 1 Remove floor bracket and fasteners from the packaging.
Step 2 Fixing the floor bracket to the inverter.
Step 3 Place the floor bracket onto the chosen floor position.
Step 4 Mark the positions to drill holes using the floor bracket as the template.
Step 5 Drill holes according to the marks made before.
In order to avoid electrical shock or other injury, inspect existing electronic
or plumbing installations before drilling holes.
Step 6 Attach the floor bracket to the floor firmly with the supplied expansion bolt
set. The torque for fastening the nut is 35 Nm.
Step 7 Assemble the cap onto the inverter for better weatherproof function.
27
5 Mechanical Installation
User Manual
5.3.4 Horizontally Installing
Step 1 Remove the bracket and fasteners from the packaging.
Step 2 Assemble the bracket to the recesses on the back of the inverter and make
sure them fit perfectly together with the mounting ear. Fix the bracket with
two M4×16 screws.
Step 3 Install the fixing plates on the bracket.
Step 4 Assemble the cap onto the inverter for better weatherproof function.
Step 5 Move the inverter to the chosen position and attach the fixing plate to the
floor firmly with the supplied expansion bolt set.
Ensure there are no plants nearby!
28
User Manual
5 Mechanical Installation
L1*: Distance from the center of the fans to the floor.
L2*: The shortest distance from the top cover of the inverter to the PV panel.
You may order the brackets from Sungrow.
29
6 Electrical Connection
Once the inverter is firmly attached to the appropriate location, it can be connected
to the PV power system.
Installation shall comply with local regulations and technical rules.
Improper operation during the wiring process can cause fatal injury to the
operator or unrecoverable damage to the inverter.
Only qualified personnel can perform the wiring work.
Prior to any electrical connection, keep in mind that inverter has dual power
supplies. It is mandatory for technical personnel to wear personal protective
equipment: helmet, footwear and gloves during the electrical work.
6.1 Connection Conduit Entries
Conduit entries for all versions are located on the bottom and at the sides of the
combiner unit. Conduit entries are illustrated below.
Fig. 6-1 Conduit entries
No.
Description
1
2
3
DC cable openings with plastic threaded plug. Trade size 1-1/2''
AC cable openings with plastic threaded plug. Trade size 1''
Communication cable openings with plastic threaded plug. Trade size 1/2''
Make sure the appropriate conduit hub is used in order to maintain required
30
User Manual
6 Electrical Connection
spacing between wiring groups and ensure the integrity of the NEMA 4X
environmental rating.
If inverter is wall-mounted or horizontally-mounted, both the bottom
and the knockouts on the two side of the inverter can be used for
conduit entries installation.
If inverter is ground-mounted, only the knockouts on the two side of
the inverter can be used for conduit entries installation.
6.2 Combiner Unit Description
There are five models of the combiner unit available for either the 30 kW or 36 kW
versions. The major differences between the five combiner unit layouts are shown
below.
Tab. 6-1 Complete list of combiner unit components
No.
Description
No.
Description
1
2
3
DC switch
DC SPDs (Surge Protection Devices)
Configuration circuit board
6
7
8
4
AC connection circuit board
9
5
AC connection terminal block
10
AC switch
AC SPD
DC Fuses
Equipment ground conductor
busbar
Communication circuit board
SG30-S0-VERSION
31
6 Electrical Connection
User Manual
SG30_36KU-S1-VERSION
SG30_36KU-S2-VERSION
6.3 Connecting Inverter to AC Grid
6.3.1 AC Side Requirements
Only after receiving prior approval from the local grid company as
required, should you connect the inverter to the grid.
Prior to connecting to the utility grid, verify whether the grid voltage and frequency
are within the range of inverter output parameters, referred to “Appendix”.
Otherwise consult local grid company for solution.
Residual Current Device
With an integrated universal current-sensitive residual current monitoring unit
inside, the inverter is able to distinguish the fault currents from normal capacitive
leakage currents. The inverter will disconnect from mains as soon as a fault current
of more than limit value has been detected.
However if an external RCD or residual current breaker is mandatory, the switch
must trigger at a failure current of 300mA or higher.
32
User Manual
6 Electrical Connection
6.3.2 Grid Connection
Wiring methods used should be in accordance with the National Electric Code,
ANSI/NFPA 70 and/or any prevailing local codes and regulations.
An AC terminal block inside the combiner unit is used for the five-wire grid
connection (L1, L2, L3, N, PE) of the inverter.
AC Cable Requirements
Consider the following facts when select AC cables specifications and types:
y The grid impedance of the AC cable must correspond to the specification to
avoid unintended disconnection from the grid or derating of the output power.
y Voltage drop and other consideration may use the larger size cables. Avoid
power loss in cables of more than 1% of nominal inverter rating.
y Withstand ambient temperature;
y Layout type (inside wall, underground, free air etc.);
y UV resistance and so on.
Use only Copper (Cu) wire rated for 90°C (194°F), solid or with type B or type C
stranding (19 strands maximum). For conductors with finer stranding, a suitable UL
listed wire ferrule must be used.
The cross-section of the AC cable conductor must be sized in order to prevent
accidentally disconnections of the inverter from the grid due to high impedance of
the cable that connects the inverter to the power supply point.
The table shows the maximum length of the cable conductor based on the
cross-section.
Cross-section of AC cable conductor
Maximum length of the
cable conductor(m)
10mm²
16 mm²
30m
50m
Connecting Inverter to AC Grid
When connecting the inverter to the grid, either a wye connection (three phase lines
and a neutral line) or a delta connection (three phase lines) can be used.
In either connection type, the ground wire connection is mandatory.
33
6 Electrical Connection
User Manual
Danger to human life due to high voltage existing inside the inverter!
Make sure that all the DC and AC cables to the inverter are not live before
you start the electrical work.
To prevent electrocution hazards, all the connection operations must be
carried out with the AC disconnect switch on the right side of the inverter
open and locked out.
For all models, connection to the AC terminal block is made by pulling conductors
through a raceway connected to the AC cable knockout.
Step 1 Disconnect AC circuit breaker and prevent
it from reconnection inadvertently.
Step 2 Loose the six screws on the lower combiner
unit and remove the cover of the combiner
unit.
Step 3 Remove the threaded plastic plug from the
AC cable knockout and replace with a
conduit hub sized to fit the required wiring
and raceway.
Step 4 Strip off AC cables as the following
indication.
For conductors with finer stranding, a suitable UL listed wire ferrule
must be used.
Step 5 Pull AC cables through the conduit opening and connect the necessary
conductors to AC pressure type terminal blocks
y For Wye grid, connect Neutral, L1, L2, L3, and PE conductors.
y For Delta grid, connect L1, L2, L3, and the PE conductors to the corresponding
terminals on the AC Terminal Block.
y Observe the AC terminal layout. Device will not work normally if the phase
cable is connected to the PE terminal.
y Do not squeeze or press the cable insulation layer. Improper connection
may affect the normal operation of the inverter.
Additionally, when using a delta connection, the unused N terminal and PE terminal
must be connected with a short jumper cable (green or green/yellow) of 10AWG.
34
User Manual
6 Electrical Connection
Fig. 6-2 Wye grid connection
Fig. 6-3 Delta grid connection
6.4 Connecting Inverter to PV Arrays
Lethal voltage exists!
PV arrays produce electrical energy when exposed to light and thus can
create an electrical shock hazard. Wiring should only be performed by
qualified personnel.
Make sure that the maximum input-ground capacity of the inverter is less
than (0.12uf/kW) * 30kW/36kW, otherwise the inverter will not function
properly.
35
6 Electrical Connection
User Manual
Before connecting the PV arrays to the inverter, make sure that the
impedances between the positive terminal of the PV string and Earth and
the impedances between the negative terminal of the PV string and Earth
are larger than 1Mohm.
There is a risk of inverter damage! The following requirements should be met;
otherwise they will lead to loss of any and all warranty rights.
y Make sure that the maximum short circuit current of each DC input is less than
inverter allowable limit.
y Make sure that the maximum open voltage of each string is less than 1000V.
Voltage over 1000V can damage the inverter.
6.4.1 PV Inputs Configuration
The inverter has two PV input areas DC1 input and DC2 input, each owning its MPP
tracker.
The two PV inputs can be configured in independent mode or parallel mode.
PV Configuration Mode- Independent Mode
For independent mode, the two PV inputs work independently, each with its own
MPPT. Therefore the two PV inputs can be different with each other, including
different PV module types, different numbers of connected in PV string, different tilt
angles or orientation angle of PV modules.
As shown in the following diagram, the inverter should choose independent mode
due to different orientation angle between the two PV inputs.
36
User Manual
6 Electrical Connection
To make sure maximum DC power can be utilized, PV strings connected to
individual input area should have a homogenous structure, including the
same type, the same number, identical tilt and identical orientation.
Prior to connecting the inverter to PV inputs, the following electrical specifications
must be met simultaneously:
Total DC Power
Limit
DC Power Limit
for Each Input
Open-circuit
Voltage Limit for
Each Input
Short-circuit
Current Limit for
Each Input
35000W
41000W
17500W
20500W
1000V
1000V
60A
60A
Considering the negative voltage temperature coefficient of PV module, more
attention should be paid to the open-circuit voltage of PV strings when designing at
the lowest ambient temperature.
PV Configuration Mode-Parallel Mode
For parallel mode, the PV inputs can be configured in parallel inside the combiner
unit.
All PV strings connected to the inverter have a homogenous structure, including the
same type, the same number, identical tilt and identical orientation. As shown in the
following diagram, the inverter may choose parallel mode due to no difference
between the two PV inputs.
37
6 Electrical Connection
User Manual
Prior to connecting the inverter to PV inputs, the following electrical specifications
must be met simultaneously:
Total DC Power Limit
Open-circuit Voltage
Limit for Each Input
Short-circuit Current
Limit for Total Input
35000W
41000W
1000V
1000V
120A
120A
You should also take the negative open-circuit voltage temperature coefficient into
consideration when designing the PV string.
Configuration of PV Connection Mode
PV configuration mode of the inverter can be performed by a switch on the
configuration circuit board.
y Independence mode: turn the switch ON.
y Parallel mode: turn the switch OFF.
6.4.2 PV Connection Procedures
Conduit entries for all versions are located on the bottom and both side of the
combiner unit
Make sure the appropriate conduit hub is used in order to maintain required
spacing between wiring groups and ensure the integrity of the NEMA 4X
environmental rating.
38
User Manual
6 Electrical Connection
DC Cable Requirements
Use only Copper (Cu) wire rated for 90°C (194°F), solid or with type B or type C
stranding (19 strands maximum). For conductors with finer stranding, a suitable UL
listed wire ferrule must be used.
Cross-section
Area Range
Max. Withstand Voltage
Max. input current for
each PV string
4...6mm2
12AWG…10AWG
1000V
12A
The input current of each input channel should be less than 12A, otherwise
the fuse may blow out.
DC Cable Connection Procedures
Make sure that all the DC and AC cables to the inverter are not live before
you start the electrical work.
Step 1 Strip off 12mm insulation layer from
all DC cables.
Step 2 Disconnect the DC switch and locked out.
Step 3 Configure PV configuration mode via jumper cables according to actual PV
conditions. Please refer to”6.4.1 PV Inputs Configuration”.
If inverter selects parallel PV configuration mode, you should connect DC1+ to DC2+
and DC1- to DC2- on the DC connection circuit board with jumper cables of
cross-section not less than 6mm2 (10 AWG) as the following diagram shown. The
existing cable connections are not displayed in the below diagram.
39
6 Electrical Connection
User Manual
DC1+
DC2+
DC1-
DC2-
The connection of each four ports in one terminal is equipotential.
Step 4 Remove the threaded plastic plug from the AC cable knockout and replace
with a conduit hub sized to fit the required wiring and raceway.
Step 5 Check the connection cable of PV string for the correct polarity and that the
open-circuit voltage does not exceed the inverter input limit 1000V, even
under the lowest operating temperature.
• Check the positive and negative polarity of the PV cells. After
confirmation, you can insert the DC cables into the input terminals in
the cabinet of the inverter.
• For the same MPPT, reverse connection of a single string is prohibited.
A permanent failure of the system or inverter may follow if otherwise.
Step 6 Pull all DC cables through the conduit opening and tighten a pair of positive
and negative cable ends into corresponding terminals with the torque range
from 1.2Nm to 1.5Nm. Connect other DC cables following the
above-mentioned procedures.
40
User Manual
6 Electrical Connection
6.5 Grounding the Inverter
Because of the transformer-less design of the inverter, neither the DC
positive pole nor the DC negative pole of the PV string is permitted to be
grounded.
6.5.1 Grounding System Overview
All non-current carrying exposed metal parts of the equipment and other
enclosures in the PV power system should be grounded (e.g., PV arrays frame and
inverter enclosure).
Where there is only one inverter in the PV power system, connect “PE” cable to the
installation ground.
41
6 Electrical Connection
User Manual
Where there are multiple inverters in the PV power system, connect “PE” cables of all
inverters and mounting frame of PV arrays to the same copper bus bar. In this way, it
will establish equipotential connection.
Inverter 1
Inverter 2
Inverter n
PV Arrays 1
PV Arrays 2
PE
PE
PE
PV Arrays n
Mounting Frame of PV
arrays
Copper Busbar
Grounding Electrode
Grounding of PV Power System
L1L2 L3N
AC Circuit Breaker
Inverter
L1
L2
L3
N
PE
AC Grounding Electrode
Grounding of Inverter AC Side
Fig. 6-4 Grounding for Inverter
6.5.2 Second Protective Earth Terminal
The inverter is equipped with second protective earth terminal as specified in EN
50178.
Second PE Terminals
There are two second PE terminals on the right side of the inverter. Users may
choose one to connect PE connection.
42
User Manual
6 Electrical Connection
Fig. 6-5 Second PE Terminals
Second PE Connection
Item
Description
A
Screw
Remark
M4×12mm
B
C
D
E
Lock washer
Washer
Cable socket
Yellow-green cable
16mm2(5AWG)
Fig. 6-6 Connection of the Second PE Connection
*The connection parts are not included in the delivery scope.
6.6 Communication Connection
6.6.1 Communication Overview
The inverter operation information can be transferred via its integrated RS485
interface to a PC with monitoring software (such as SolarInfo Insight), or to data
logging device (such as SolarInfo Logger).
RS485 is the standard communication choice for inverter.
There are communication terminals (RS485) at the bottom of the inverter. And there
apply two optional connection terminals on the configuration circuit board: RS485
A/B terminal blocks and RJ45 plug in terminals.
43
6 Electrical Connection
User Manual
In the case of a need of terminating resistor, switch on the 120Ω terminating resistor
switch, a terminating resistor will be connected between the communication cables
of the inverter.
Fig. 6-7 Communication related devices on the Configuration Circuit Board
Before communication connection, prepare communication cable and RJ45 plug.
RS485 cable’s requirements to ensure quality of communication:
y RS485 shielded twisted pair cables
y Shielded network cable
A converter such as RS485-232 converter or SolarInfo Logger, which
converts 485 to 232 signal, is needed between inverter and PC.
6.6.2 Communication System
For Single Inverter
Where there is only one inverter, a RS485 cable enables connection between
inverter and data logging device.
44
User Manual
Inverter
6 Electrical Connection
Communication Connection
(RS 485 A/B bus or RJ 45)
RS 485 A/B bus
RJ 45
Only out.
Only out.
Terminating
Resistor
No
Single one
For Multiple Inverters
Where there is more than one inverter, all inverters can be connected to data
logging device in daisy chain. The first and last inverters in the chain must be
terminated with a resistor of 120Ω. The shielding layer of RS485 cable should be
single-point grounded.
The maximum number that inverters are connected in the daisy chain depends on
converter, data logging device and other factors. Please refer to converter’s or data
logging device’s manual to obtain the limit.
45
6 Electrical Connection
Inverter
User Manual
Communication Connection
(RS 485 A/B bus or RJ 45)
RS 485 A/B bus
RJ 45
Only out
Only out
Terminating
Resistor
Yes
Inverter 1
In and Out
In and Out
No
Inverter
2…n-1
In and Out
In and Out
Yes
Inverter n
6.6.3 RS485 Communication Connection
RS485A/B Bus Connection
Step 1 Remove the threaded plastic plug from the AC cable knockout and replace
with a conduit hub sized to fit the required wiring and raceway.
Step 2 Lead RS485 shielded twisted pair cables through conduit opening to the
configuration circuit board.
Step 3 Trip off the insulating layer of the communication cables. Connect the cables
to the RS485 bus terminal blocks.
Step 4 According to the position of the inverter (refer to the prior section), repeat
step 1…2 to connect the other RS485 cables.
Step 5 Pull cables outwards to confirm whether they are fastened firmly.
Step 6 According to the position of the inverter (refer to the prior section) switch ON
or OFF the terminating resistor.
46
User Manual
6 Electrical Connection
Step 7 If there is no other connection procedure, recover and fix the front cover of
the combiner unit.
Step 8 Now perform RS485 communication connection as the diagram shown
above. Connect the other end of cable to other devices. Communication
terminal definition is referred to device manual.
Step 9 Verify the communication connection and configure the communication
parameters.
If there is more than one inverter to communicate with a PC or a data
logger, it is crucial to configure the communication parameters of each
inverter. See “10.12 Communication Parameters Setting”.
SolarInfo logger and RS485-232 converter are optional parts and can be
ordered from Sungrow.
RJ45 Connection
Step 1 Remove the threaded plastic plug from the AC cable knockout and replace
with a conduit hub sized to fit the required wiring and raceway.
Step 2 Lead Network cable through conduit opening to the configuration circuit
board.
Step 3 Use the Ethernet crimper to crimp the cables and connect cables to RJ45
plug according to TIA/EIA 568B.
Step 4 Connect the RJ45 plug into the RS485 in/RS485 out terminal on the
configuration circuit board.
Step 5 According to the position of the inverter (refer to the prior section), repeat
step1…3 to connect the other Network cables to the RS485 out/RS485 in
terminal on the configuration circuit board.
Step 6 Pull cables outwards to confirm whether they are fastened firmly.
47
6 Electrical Connection
User Manual
Step 7 According to the position of the inverter (refer to the prior section) switch ON
or OFF the terminating resistor.
Step 8 If there is no other connection procedure, recover and fix the front cover of
the combiner unit.
Step 9 As for the wires which connect to the logging devices, use the Ethernet wire
stripper to strip the insulation layer and connect the RS485 A and B cables (3
and 6) to data logging device or RS485-232 converter. Communication
terminal definition is referred to the device manual.
Verify the communication
communication parameters.
connection
Step 10
and
configure
the
SolarInfo logger and RS485-232 converter are optional parts and can be
ordered from Sungrow.
6.6.4 Configurable Dry Contact
There are fault output dry contacts and LOCAL STOP dry contacts located on the
configurable circuit board.
Fault output dry contacts: The relay can be configured as fault alarm output, which
can be configured by the user as either normally open contact (by using A2&A1) or
normally closed contact (by using A2&NC). The relay switches when a fault occurs.
The devices to be connected to the relays must comply with the related
requirements:
AC Requirements
DC Requirements
Max. Voltage: 250Vac
Max. Current: 5A
Max. Voltage: 30Vdc
Max. Current: 5A
LOCAL STOP dry contacts: The dry contacts can be configured as LOCAL STOP by
using ON&ON. When the two ON terminals are short-circuited by external signal,
inverter will stop running immediately.
Max. Voltage Limit
Max. Current Limit
250V
5A
48
User Manual
6 Electrical Connection
6.6.5 RS485-NET Converting Card (Optional)
You may plug a RS485-NET converting card in CON10 and fix it on the
Communication Circuit Board with the delivery screws.
The RS485-NET converting card is an optional part and can be ordered
from Sungrow.
49
7 Commissioning
Commissioning is a critical part for a well-installed PV system, which can protect
against fires, injury and electrical shock.
7.1 Inspection before Commissioning
Before starting the inverter, you should check the following items.
1.
Inverter unit is accessible for operation, maintenance and service.
2.
Re-check that the inverter is firmly installed onto the wall.
3.
Space for ventilation well is provided for one inverter or more than one
inverter.
4.
Nothing is left on the top of the inverter unit.
5.
Inverter and accessories are correctly connected.
6.
Cables are routed in safe place or protected against mechanical damage.
7.
Specification of AC circuit breaker is reasonable.
8.
Terminals not used underneath the inverter are sealed.
9.
Warning signs & labels are suitably affixed and durable.
7.2 Commissioning Procedure
If all checking items mentioned above meet the requirements, precede the
following procedures to start up the inverter for the first time.
Step 1 Close external AC circuit breaker.
Step 2 Rotate DC switch to “ON” position.
Suppose there are sufficient sunlight and
enough DC power. PV arrays initialize and
supply DC power to inverter. The LCD display
is activated to check the validity first. If there
is a defect on the display, contact Sungrow.
50
User Manual
7 Commissioning
Step 3 Press j to choose country code. Confirm
the settings by Pressing ENTER.
Step 4 Select the country code according to the
inverter’s installation country. Each country
code represents corresponding local
protective parameters that have been preset
before delivery. Before country setting, there
is warning screen.
After setting the Country parameter, please proceed to set other
parameters of the inverter in accordance with the specific requirements
of the local grid. Before commissioning, please check thoroughly if the
set parameters meet the local grid requirement.
Refer to “10.11 Protective Parameters Setting” for country code explanation. If the
inverter is installed where the country code is not included, please choose item
“Other” and manually set the protective parameters.
If the country code is not set correctly during commissioning, reset the
protective parameters as dictated in “10.11 Protective Parameters Setting”.
There may be faults if otherwise.
Step 5 Configure grid code on the display. Press j
to select grid code. Confirm the selection by
Pressing ENTER. Where, LV indicates Low
Voltage Grid Code; MV indicates Middle
Voltage Grid Code.
Step 6 When choose MV, Press h to enter the LVRT
function selection, Press j to switch on or
off the LVRT function and Press ENTER to
confirm the selection.
The Kf configure item will appear only when switching on the LVRT function.
51
7 Commissioning
User Manual
If the Country selected does not have the “Grid codes” directives, this
configuration will not affect the following procedures.
However, you may select the MV to enable/disable the LVRT function
regardless of the country selected.
Step 7 After configuring the Grid Code, there will
be a “Pro-param” type selection screen and
then corresponding sub-menu will come
up. For detailed information, please refer to
“10.11 Protective Parameters Setting”.
Step 8 Configure time according to the local time.
Time setting is very important, which
directly affects data logging. Press h to
move cursor and Press j to scroll up time
value. Confirm the settings by Pressing
ENTER.
Step 9 After configuring all parameters, there will
be a “setting confirmation” screen. Check
whether all above-mentioned parameters
are correct. Confirm by Pressing ENTER.
Cancel by Pressing ESC and reset.
Inverter will enter into startup process.
Observe status of LED indicators and the
LCD
main
screen.
If
inverter‘s
commissioning succeeds, the “RUN”
indicator will be lit and “RUN” will be
displayed on the “State” area.
Step 10
If inverter’s commissioning fails, the “FAULT” indicator will be lit and “fault” will occur
on the display. Press j to view “current fault” information. Remove the existing fault
and then repeat starting up inverter as the above procedures.
52
8 Disconnecting, Dismantling and
Disposing the Inverter
8.1 Disconnecting the Inverter
For maintenance work or any service work, inverter must be switched off. In normal
operation, switching off is not necessary.
In order to disconnect the inverter from the AC and DC power sources, you should
proceed with the following procedures. Otherwise you will be exposed to lethal
voltages or the inverter will be damaged.
Step 1 Rotate the external DC switch and AC switch at the sides of the inverter to
the “OFF” position and prevent them from reconnecting.
Step 2 Turn off the upstream DC circuit break.
Please strictly follow the above sequence. Inverter will not work normally if
otherwise.
Step 3 Wait about ten minutes until the capacitors inside the inverter have
discharged.
Step 4 Loose the six screws on the lower combiner unit and then remove the lid.
Step 5 Measure AC voltage to ground at the AC terminal to confirm AC output of
inverter at the AC circuit breaker is voltage free.
Step 6 Loose screws to remove AC cables.
Step 7 Disconnect DC cables from the inverters.
53
8 Disconnecting, Dismantling and Disposing the Inverter
User Manual
8.2 Dismantling the Inverter
Step 1 Remove the cap and loose the screws from the upper lid.
Step 2 Lift up the upper lid slightly, release the locking part of the ribbing of the LED
screen and remove the lid.
Step 3 Disconnect all connection cables between the electrical cabinet and the
combiner box and insert all cables in the wire mount.
54
User Manual
8 Disconnecting, Dismantling and Disposing the Inverter
Step 4 Unscrew all connection screws between the electrical cabinet and the
combiner box with a suitable spanner and detach the electrical cabinet from
the combiner box.
55
8 Disconnecting, Dismantling and Disposing the Inverter
User Manual
8.3 Disposing the Inverter
Users should take the responsibility for the disposal of the inverter.
Some parts and devices in the inverter, such as LCD displayer, batteries,
capacitors, may cause environment pollution. Users must comply with the
related local regulations to avoid causing pollution.
56
9 Troubleshooting and
Maintenance
9.1 Troubleshooting
9.1.1 Troubleshooting of LED Indicator
See “Tab. 2-2 Description of LED Indicator Status” for definition of LED’s states.
Type of fault
Troubleshooting
LED indicators and
LCD screen cannot be
lit
1. Disconnect AC side circuit breaker.
2. Rotate DC switch to the “OFF” position.
3. Check the polarity of DC input.
1. Disconnect AC side circuit breaker.
2. Rotate DC switch to the “OFF” position.
3. Check the correctness of electrical connection of inverter.
See “6 Electrical Connection”.
4. Check whether DC input voltage exceeds the inverter start
voltage of inverter.
5. If all above conditions are OK, please contact with
Sungrow.
1. A fault is not removed yet.
2. Perform troubleshooting in according to fault type in LCD
screen. See “9.1.4 Troubleshooting of Faults in LCD Screen”.
“RUN” indicator goes
out
“Fault” indicator is lit
3. If it cannot be solved, please contact Sungrow.
“RUN” indicator is
blinking
“Fault” indicator is
blinking and buzzer
for a minute.
Warning fault occurs of the inverter.
Acing warning occurs of the inverter.
57
9 Troubleshooting and Maintenance
User Manual
9.1.2 Arc Fault Detection Self-test Fault
An auto-test circuit is included in the module design of the inverter’s AFDI function.
If a DC arc fault is detected, the corresponding fault code will display on the LCD
screen.
Refer to “9.1.4 Troubleshooting of Faults in LCD Screen” for display fault
code and description to remove fault and manually start-up the inverter.
9.1.3 DC Arc Fault
If a DC arc fault is detected during normal
operations, the inverter will disconnect from the
AC grid.
The DC arc fault is displayed on the inverter’s LCD screen and the inverter is
powered off. Please check the circuit and manually remove the fault by
pressing ENTER.
9.1.4 Troubleshooting of Faults in LCD Screen
When faults occur, “Fault” state will be shown on the main screen. Press j to view
multiple “current fault” information pages.
Fault
Code
Description
Troubleshooting
002
The grid voltage has
exceeded
inverter
allowable
upper
limit.
1. Check the voltage of the grid.
2. If the grid voltage exceeds the permissible
range of inverter protective parameters, ask utility
grid company for solution.
3. If the grid voltage is within the permissible
range, contact Sungrow Service Dept..
003
Inverter has checked
that
the
instantaneous
sample value of the
grid voltage exceeds
the allowable limit
for some time.
1. This is a short-term fault due to grid condition.
Wait a moment for inverter recovery.
2. If the fault still exists, please contact Sungrow
Service Dept..
58
User Manual
9 Troubleshooting and Maintenance
Fault
Code
Description
004
The grid voltage has
fallen
below
inverter’s allowable
lower limit.
005
The grid voltage is
too low.
006
007
008
009
010
011
012
Troubleshooting
The
AC
output
current
exceeds
inverter protective
limit.
Inverter has checked
AC
overcurrent
temporarily.
The grid frequency
has
exceeded
inverter
allowable
upper limit.
The grid frequency
has fallen below
inverter
allowable
lower limit.
The inverter will self-recover after several
seconds.
1. Check the frequency of the grid.
2. If the grid frequency exceeds the permissible
range of inverter protective parameters, ask utility
grid company for solution.
3. If the grid frequency is within the permissible
range, contact Sungrow Service Dept..
1. Check whether AC circuit breaker is triggered.
2. Check whether AC cables are all firmly
connected.
3. Check whether grid is not on service.
4. If all conditions are OK and this fault still occurs
in the LCD screen, contact Sungrow Service Dept..
Islanding
The DC component
of AC current has
exceeded
inverter
limit.
Inverter has detected
that there is a failure
current.
013
Inverter has checked
that the grid is
abnormal
014
The
average
1. Check the voltage of the grid.
2. If the grid voltage exceeds the permissible
range of inverter protective parameters, ask utility
grid company for solution.
3. If the grid voltage is within the permissible
range, contact Sungrow Service Dept..
1. This is a short-term fault due to grid condition.
Wait a moment for inverter recovery.
2. If the fault still exists, please contact Sungrow
Service Dept..
1. The inverter will resume if the output current
falls below the protective value.
2. If the fault still exists, please contact Sungrow
Service Dept..
grid
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
1. Check the PV strings for ground fault.
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
1. Wait a moment for grid recovery.
2. If the grid parameters exceed the permissible
range of inverter protective parameters, ask utility
grid company for solution.
3. If the grid frequency is within the permissible
range, contact Sungrow Service Dept..
1. Wait a moment for inverter recovery.
59
9 Troubleshooting and Maintenance
Fault
Code
Description
Troubleshooting
voltage over 10
minutes is not within
the
permissible
range.
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
015
Grid impedance has
exceeded inverter’s
limit
016
The
AC
overloads.
017
The inverter has
checked that there is
unbalance between
the three phase
voltages.
019
The bus voltage is
temporarily high.
020
The bus voltage is
high.
021
022
023
024
025
026
60
User Manual
output
Inverter has checked
that
there
is
overcurrent of PV1
input.
Inverter has checked
that
there
is
overcurrent of PV2
input.
PV
configuration
mode has changed
during
inverter
running.
Inverter has checked
the deviation of
neutral
point
voltage.
Inverter has checked
out the unbalance of
neutral point voltage
temporarily.
There is high Bus
fluctuation voltage.
1. Check AC cables for appropriate size.
2. Wait a moment for inverter recovery.
3. If the fault occurs repeatedly, contact Sungrow
Service Dept..
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
Check the layout and the wiring of PV1 input.
Check the layout and the wiring of PV2 input.
Check the PV input configuration mode and
restart the inverter when necessary.
1. Inverter will recover if the deviation value falls
below the protective limit.
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
1. Inverter will recover if the deviation value falls
below the protective limit.
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
1. This is a short-term fault. Wait a moment for
inverter recovery.
2. If the fault still exists, please contact Sungrow
User Manual
Fault
Code
9 Troubleshooting and Maintenance
Description
Troubleshooting
Service Dept..
027
036
037
038
039
040
The DC current is not
balanced between
the two PV inputs for
parallel
PV
configuration mode.
The temperature of
module is too high
The
ambient
temperature is too
high
The inverter has
checked that there is
a fault of relay.
The
insulation
resistance is low.
(ISO-flt)
AC or DC overcurrent
fault,
or
DC
overvoltage fault.
041
There is a fault with
sampling channel.
042
Current imbalance.
043
044
045
046
047
048
The
ambient
temperature
falls
below -25oC
There is a fault with
DC/AC
inversion
circuit
There is a fault with
PV1 boost circuit.
There is a fault with
PV2 boost circuit.
The PV configuration
mode set on the
display is not in
accordance with the
configuration in the
combiner unit.
Phase-R
current
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
1. Check whether AC output power exceeds
norminal power too much.
2. Check whether fans work normally and
whether there are some abnormal fans. Please
replace broken fan, in necessary.
3. Clean air grills of outlet.
4. If the fault still exists, please contact with
Sungrow.
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
If the fault occurs repeatedly, contact Sungrow
Service Dept..
Disconnect inverter to stop. Wait for ambient
temperature to rise above -25 ℃ and then start
inverter again.
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
1. Disconnect inverter.
2. Re-select PV configuration mode and
re-connect PV strings. For more detailed
information please refer to “6.4 Connecting
Inverter to PV Arrays”.
1. Wait a moment for inverter recovery.
61
9 Troubleshooting and Maintenance
Fault
Code
User Manual
Description
Troubleshooting
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
070
071
072
sampling
channel
fault.
Phase-S
current
sampling
channel
fault.
Phase-T
current
sampling
channel
fault.
Hardware
Overvoltage/
Overcurrent
protection
Fans are defective.
Fault with AC SPD
Fault with DC SPD
073
Fuse has blown out
074
Communication fault
of LCD
075
Solar irradiation is
not sufficient for
inverter operation.
076
PV1 overload
077
PV2 overload
078
PV1 power abnormal
warning
079
PV2 power abnormal
warning
087
There is a fault with
the AFD block.
088
Arcing warning
089
AFD disable warning
049
050
051
62
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
Disconnect inverter and remove the broken fan.
It is necessary to replace the SPD module. Contact
Sungrow Service Dept..
Disconnect inverter and replace the fuses.
Contact Sungrow Service Dept..
A fault has occurred in the internal
communication of the inverter. However, the
inverter continues feeding into the grid. Contact
Sungrow Service Dept..
1. Wait for higher irradiation.
2. If this recurs at medium irradiation, check the
PV system design and correct the connection of
PV inputs.
Check the PV system design and correct the
connection of PV1 inputs.
Check the PV system design and correct the
connection of PV2 inputs.
1. Check whether the PV1 input not connected or
loose.
2. If all PV1 input cables are firmly attached and
the warning fault still exists, please contact
Sungrow Service Dept..
1. Check whether the PV2 input not connected or
loose.
2. If all PV2 input cables are firmly attached and
the warning fault still exists, please contact
Sungrow Service Dept..
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact Sungrow
Service Dept..
Check the associated circuit and press ENTER to
remove the fault.
Remove the fault by reactivating the AFD
User Manual
9 Troubleshooting and Maintenance
Fault
Code
Description
532-547
Reverse
polarity
warning
of
PVS
connection.
Troubleshooting
function on the LCD screen.
1. Check the polarity of the PV inputs, if the
polarity is reverse, please reconnect PV strings.
2. If the fault still exists, please contact with
SUNGROW.
1. Check whether the PV array is shielded. If the
PV array is clear and is not shielded, check
whether the PV modules are faulty.
548-563
The output current of
the PVS is obviously
abnormal.
2. Check whether there is any DC input cable
disconnected. If yes, refer to “10.13.1 PVS
Detect Settings” to reset the inverter.
3. If the fault still exists, please contact with
SUNGROW.
9.2 Maintenance
9.2.1 Routine Maintenance
Items
System
clean
Fans
Devices
check
Methods
Check the temperature and dust of the inverter.
Clean the inverter enclosure.
Check the humidity and dust of the environment.
Meanwhile check whether the filter function of
the air inlet is ok. Clean the air inlet and outlet,
when necessary.
Check whether there is crack of the fan blade
Check whether there is any abnormal noise of the
fan turning.
Clean or replace the fans.
Check the fuses and the DC SPD.
Replace the fuse.
Contact Sungrow to order new DC SPDs.
Period
Six months to a
year (it depends
on the dust
contents in air.)
Once a year
Every 6 months
9.2.2 Maintenance Instruction
Fans’ Maintenance
There are four fans at the side of the inverter for active cooling during running
operation. If the fans are dirty or out of work, the inverter may not be cooled down
well and its efficiency may accordingly decrease. Therefore it is necessary to clean
the dirty fans or replace the broken fans as the following indications.
63
9 Troubleshooting and Maintenance
User Manual
y Disconnect the inverter from the grid first and then PV arrays before any
maintenance work.
y Lethal voltage still exists in the inverter. Please wait for at least ten
minutes and then perform maintenance work.
y Fans’ maintenance work may only be performed by qualified electricians.
Step 1 Disconnect the AC circuit breaker.
Step 2 Rotate DC switch to the “OFF” position and then turn off the upstream DC
circuit break.
Step 3 Wait for at least ten minutes.
Step 4 Disconnect all DC and AC connection in the reverse procedures in the “6
Electrical Connection”.
Step 5 Loosen the screws as the right diagram
shown.
Step 6 Disassemble the metal plate slightly.
Step 7 Release the locking part of four
connectors by pressing on the ribbing
of the locking hooks and pull outwards.
64
User Manual
9 Troubleshooting and Maintenance
Step 8 Remove fans from the inverter.
Step 9 You can clean the dirty fans with soft brush or vacuum cleaner. Or replace the
broken fans.
Step 10
Re-assemble the fans onto the inverter.
Step 11
Connect the four connectors and fasten them with cable ties.
Step 12
Assemble the plate by fastening the four screws.
Step 13
The inverter can be put into the application again.
Replacing the Fuses
For optional version inverter, it is necessary to replace the blow out fuses due to
overcurrent.
To do so, proceed as follows:
Step 1 Disconnect AC circuit breaker.
Step 2 Rotate DC switch to the “OFF” position and then turn off the upstream DC
circuit break.
Step 3 Wait for at least ten minutes.
Step 4 Open the combiner unit as described in section “8 Disconnecting,
Dismantling and Disposing the Inverter”.
Step 5 Check, using a multimeter, the assignment and conductivity of the fuse. A
fault occurs to the related fuse if it is non-conductive.
Step 6 Check the fault fuse by installer. New fuse can be ordered from Sungrow.
Step 7 Remove the fuse puller by pulling the handle and replace the blown out fuse.
65
9 Troubleshooting and Maintenance
User Manual
Step 8 Insert the fuse puller into the fuse holder.
Step 9 Close the inverter and restart the inverter.
Clean Air Inlet and Outlet
A huge amount of heat is generated in the process of running the inverter. The
inverter adopts a controlled forced-air cooling method.
In order to maintain good ventilation, please check whether there is anything
blocking the air inlet and outlet.
Clean the air inlet and outlet with soft brush or vacuum cleaner if necessary.
9.3 Contact Sungrow Service
Should you have any problems in operating on the inverter, please contact us:
Service hotline: +86 551 65327817
Email: service@sungrow.cn
We need the following information to provide you the best assistance:
y Type of the inverter
y Serial number of the inverter
y Fault code/name
y Brief description of the problem
66
10 Operation of LCD Display
10.1
Description of Button Function
Inverter offers two buttons for user to look up the running information and
configure parameters. The two buttons have multiple functions. Please refer to Tab.
10-1 before any operation onto inverter.
Tab. 10-1 Button Function
Button
Operation
Description
Press less than
two seconds
Move upwards or downwards, or increase the set
value. Hereinafter, it is referred to as “Press j”.
Return to the previous menu or cancel the
command. Hereinafter, it is referred to as “Press
ESC”.
Move left or right, or turn pages. Hereinafter, it is
referred to as “Press h”.
Enter into the sub-screen or confirm the command.
Hereinafter, it is referred to as “Press ENTER”.
Press more than
two seconds
Press less than
two seconds
Press more than
two seconds
The background light of the LCD screen will go out to save power if
there is no button operation for one minute. You can activate it by
pressing any button.
67
10 Operation of LCD Display
10.2
User Manual
Inverter Menu Structure
Fig. 10-1 Menu Tree-English
68
User Manual
10.3
10 Operation of LCD Display
Main Screen
If the inverter succeeds in commissioning, LCD display will enter into the main
screen, as shown in Fig. 10-2.
Fig. 10-2 Main Screen Description
No.
Description
1
2
3
4
5
6
7
Power curve. x-axis: time in hours; y-axis: output power yield Pin %.
Icons (refer to the Tab. 10-3) and the Inverter active power limits (P-W limits).
Current output power.
Energy generation during this day until now.
Total energy generation since initial commissioning.
Inverter state.
Date (year/month/date) and time.
Tab. 10-2 Inverter State Description
Inverter State
Run
Standby
Stop
Key-stop
Start
Upd fail
Fault
Warning
Description
After being energized, the inverter tracks the PV arrays’ maximum
power point (MPP) and feeds AC power to grid. This mode is the
normal mode.
Inverter will enter into Standby mode for insufficient input power.
In this mode the inverter will wait until the DC voltage recovers.
The inverter is shut down.
The inverter will stop operation by manual “Stop” through LCD
menu.
The inverter is initializing and synchronizing with the grid.
IAP (In Application Programming) update fails
If a fault occurs, the inverter will automatically stop operation,
trigger the AC relay and show “Fault” on the LCD with the “FAULT”
indicator lit.
Once the fault is removed in recovery time (set by user, see “10.10
Running Parameters Setting”), the inverter will automatically
resume running.
Inverter has checked out some warning information.
69
10 Operation of LCD Display
User Manual
Inverter State
Description
Dispatch
Derating
LCD power limitation or remote dispatch.
Input overload or over-temperature.
Communication between device internal control modules and HMI
modules failure.
Com-err
If inverter is in “Fault” state, Press h /j to view multiple “Current fault” information
pages. To know the meaning of the fault code, please refer to “9.1.4 Troubleshooting
of Faults in LCD Screen”.
Tab. 10-3 Icon Description
Icon
Description
Inverter is in IAP update process.
Inverter in power reduction state.
Fans inside are working.
Inverter is warning the running state.
10.4
Adjust Contrast
Step 1 Press ESC to enter into the contrast adjustment screen.
Step 2 Press j to increase the setting value and press h to decrease the value.
Step 3 Press ENTER to confirm the contrast setting.
70
User Manual
10 Operation of LCD Display
The contrast value ranges from 0 to 100. The recommended value is
50 or 60.
10.5
Detailed Running Information
On the main screen, there is some basic information about the inverter. For more
detailed running information, please operate as follows.
Main Screen（Press ENTER）→Menu→Run-info（Press ENTER）
LCD screen will show four detailed running information pages. Scroll pages by
pressing h /j.
“DC power input” represents the total input power of
PV1 and PV2.
“Vdc” indicates the DC voltage of each input.
“Idc” indicates the DC current of each input.
“Pdc” indicates the DC power of each input.
“Indep / Paral mode” is the PV configuration mode of
the two PV inputs.
√
indicates the corresponding input is at work.
“P-W” is inverter output active power.
“S-Va” is inverter output apparent power.
“Country” is inverter selected country code.
“Grid code” is inverter selected grid code.
“Vac” is phase voltage.
“Iac” is phase current.
“Pac” is AC output of each phase.
“F” is frequency of each phase.
“CO2-reduce” indicates total CO2 emission reduction
due to the inverter.
“E-month” is the energy generation in this month.
“h-Total” is the total running hours of the inverter.
“T-today” is today running time of the inverter.
“Temp” is the internal temperature of the inverter.
71
10 Operation of LCD Display
User Manual
All DC inputs current will be displayed on the screen.
10.6
History Records
10.6.1 Running Information Records
Main Screen（Press ENTER）→Menu（Press j）→His-record（Press ENTER）
→Run-record（Press ENTER）
On the “Run-record”
display, press j to select
the date you want to
view.
Confirm
by
pressing ENTER.
Inverter shows historical
running
information
pages. Scroll pages by
pressing j. Change to
the next record by
pressing h.
10.6.2 Fault Records
Main Screen（Press ENTER）→Menu（Press j）→His-record（Press ENTER, Press j）
→Flt-record（Press ENTER）
Inverter shows fault record pages. Scroll pages by
pressing j.
72
User Manual
10 Operation of LCD Display
The inverter can only store at most 10 latest fault records.
10.7
Start and Stop Inverter
Main Screen（Press ENTER）→Menu（Press j×2）→Start/Stop（Press ENTER）
Press j to choose “Start”/”Stop” and
press ENTER to confirm the choice.
Press ENTER to confirm.
10.8
Input Parameter Settings Password
The parameter settings are protected by the password. If you want to set the
inverter’s parameters, you have to input the correct password.
Step 1 Press ENTER to enter into “Menu” screen.
Step 2 Press j to move the cursor to “Set-param” menu item and confirm by
pressing ENTER.
Step 3 A password confirmation screen will occur. Press
h to move cursor right and Press j to input the
password 111111.
73
10 Operation of LCD Display
User Manual
Step 4 Press ENTER to confirm the password and .enter
the “Set-param” sub menu.
10.9
System Parameters Setting
10.9.1 Time Setting
If there is deviation between the time on inverter main screen and your local time,
you should perform the operation time setting. Otherwise the inverter data logging
will fail. Clock is 24-hour format.
Main Screen(Press ENTER)→Menu screen(Press j×3) →Set-param(Press ENTER)→
Enter password(Press ENTER)→Sys-param(Press ENTER, Press j)→Time(Press ENTER)
On the “Time” screen, Press h to move the cursor
right and Press j to set the correct date and time.
Confirm settings by pressing ENTER.
10.9.2 Energy Deviation Adjustment
If the accumulative value of “E-total” in the inverter is different from the value in the
external metering device, you should adjust the “Energy-adj”.
Main Screen(Press ENTER)→Menu screen(Press j×3)→Set-param(Press ENTER)→
Enter password(Press ENTER)→Sys-param(Press ENTER, Press j×2)→Energy-adj(Press
ENTER)
On the “Energy-adj” screen, Press h to move cursor right
and Press j to set the correct offset value.
Confirm settings by pressing ENTER.
The positive symbol “+” can be changed to the negative
symbol “-”.
The adjustment range is from -9999 to +9999 kWh.
(Energy-adj value)= (Real measured value)-(E-tot reading
value).
74
User Manual
10 Operation of LCD Display
10.9.3 Load Default
All history information will be unrecoverable cleared and all parameters will
return to the default value except the protection parameters and time once
the “load default” operation is performed.
Main Screen(Press ENTER)→Menu screen(Press j×3)→Set-param(Press ENTER)→
Enter password(Press ENTER) → Sys-param(Press ENTER, Press j×3) → Load
default(Press ENTER)
A password confirmation screen will occur. Press h to
move cursor right and Press j to input the password
111111.
Press ENTER to confirm “load default”.
10.9.4 Firmware Version
Main Screen(Press ENTER )→Menu screen(Press j×3)→Set-param(Press
ENTER) → Enter password(Press ENTER) → Sys-param(Press ENTER, Press
j×4 )→Firmware version (Press ENTER)
Inverter shows detailed firmware information, including
LCD version and DSP version.
The firmware version information is read only.
75
10 Operation of LCD Display
10.10
User Manual
Running Parameters Setting
10.10.1 Main Menu of Run-param
Main Screen(Press ENTER )→Menu screen(Press j×3)→Set-param(Press
ENTER)→Enter password(Press ENTER, Press j)→Run-param(Press ENTER)
On the “Run-param” screen, Press j to move arrow to
one item and Press ENTER to start this item setting.
For each item setting, Press h to move cursor right and
Press j to set the appropriate value.
Confirm by Pressing ENTER.
Tab. 10-4 Specification of Running Parameters
Parameter
Explanation
Standby
time
Recover
time
P-W limits
Q-Var
switch
The time from inverter initialization to
inverter feeding power to grid.
The time from the fault is cleared to
inverter feeding power to grid.
Inverter active power limits.
Whether to start inverter reactive
power adjustment function.
PF
Power factor
+1.000
Q-Var limits
Inverter reactive power limits
0.0%
76
Default
Range
20s
20…255s
30s
[IT: 300s]
100.0%
[Pf]
0…900s
0...100%
[Pf] / [Qt] / [Off]
/ [Q(P)] / [Q(U)]
-1.000…-0.800 /
+0.800…+1.000
0...+100%
/
0…-100%
User Manual
10 Operation of LCD Display
10.10.2 Reactive Power Regulation
The inverter provides reactive power regulation function. Use the “Q-Var switch”
parameter to activate this function and select proper regulation mode.
Mode
Explanation
Pf
Qt
Off
The reactive power can be regulated by the parameter PF (Power Factor).
The reactive power can be regulated by the parameter Q-Var limits (in %).
The PF is limited to +1.000, and the Q-Var limits is limited to 0.0%.
“Pf” Mode
The reactive power can be regulated by the parameter PF on the Run-param screen.
“Qt” Mode
The reactive power can be regulated by the parameter Q-Var limits (in %) on the
Run-param screen.
“Off” Mode
The PF is limited to +1.000, and the Q-Var limit is limited to 0.0%.
10.10.3 Save P/Q-set
On the “Save P/Q-set” screen, Press j to move arrow to
one item, Press h to move cursor right and Press j to
set.
Confirm by Pressing ENTER.
Select “Y” to save up the values set when power down.
Select “N” to restore default values when power down.
Parameter
Explanation
P-W limits
Inverter active power limits configuration.
Inverter reactive power configuration, includes Q-Var switch, PF
and Q-Var limits.
Q-Var set
77
10 Operation of LCD Display
10.11
User Manual
Protective Parameters Setting
Protective parameters are designed for the limit value that can trigger the protective
functions of the inverter.
Main Screen(Press ENTER )→Menu screen(Press j×3)→Set-param(Press ENTER)→
Enter password(Press ENTER, Press j×2)→Pro-param(Press ENTER)
A password confirmation screen will occur. Press h to
move cursor right and Press j to input the password.
Please ask Sungrow or your dealer for this password.
To make protective parameters setting convenient,
inverter provides country code selection. The protective
parameters have been configured before delivery
according to different countries utility grid
requirements. Choose the correct country code by Press
j and Press ENTER to confirm.
The description of country code is illustrated below:
Country Code
Full Name
Language
CA
US
Other
Canada
United States
Country not included above
English
English
English
Confirm by pressing ENTER after country code selection.
Choose grid code according to actual grid condition.
Note: “LV” represents Low Voltage Grid Code, and “MV”
represents Middle Voltage Grid Code.
When choose MV, Press h to enter the LVRT function
selection, and the Kf configure item will appear.
Press j to switch on or off the LVRT function and Press
ENTER to confirm the selection.
The Kf configure item will appear only when switching on
the LVRT function.
Note: If the Country selected does not have the “Grid
codes” directives, the following procedures will not be
affected.
However, you may select the MV to enable/disable the
LVRT function regardless of the country selected.
78
User Manual
10 Operation of LCD Display
Press j to select protective parameter type. Press
ENTER to confirm the selection.
Single-stage Protective Parameter
If the selected protective parameter type is
“Single-stage”, the following sub-menu will come up.
Press j to select parameter, Press h to move cursor
right and Press j to set the appropriate value. Confirm
settings by Pressing ENTER.
Tab. 10-5 Single-stage Protective Parameter Explanation
Parameter
Explanation
Max-V.grid
Min-V.grid
Max-Fgrid
Min-F.grid
Grid over-voltage value
Grid under-voltage value
Grid over frequency value
Grid under frequency value
Multi-stage Protective Parameter
If the selected protective
parameter type is “Multi-stage”,
the following sub-menus will
come up.
Press j to select parameter,
Press h to move cursor right
and Press j to set the
appropriate
value.
Confirm
settings by Pressing ENTER.
79
10 Operation of LCD Display
User Manual
Tab. 10-6 Multi-stage Protective Parameter Explanation
Parameter
Max-V. prot
Explanation
Ⅰ-Max-V. grid
Stage Ⅰ Grid over-voltage (U>)
Ⅰ-Max-V. time
Stage Ⅰ Grid over-voltage (U>) tripping time
Ⅱ-Max-V. grid
Stage Ⅱ Grid over-voltage (U>>)
Over-voltage protection
Ⅱ-Max-V. time
Stage Ⅱ Grid over-voltage (U>>) tripping time
Min-V. prot
Under-voltage protection
Ⅰ-Min-V. grid
Stage Ⅰ Grid under-voltage (U<)
Ⅰ-Min -V. time
Stage Ⅰ Grid under-voltage (U<) tripping time
Ⅱ-Min -V. grid
Stage Ⅱ Grid under–voltage (U<<)
Ⅱ-Min -V. time
Stage Ⅱ Grid under–voltage (U<<) tripping time
Max-F. prot
Over-frequency protection
Ⅰ-Max-F. grid
Stage Ⅰ Grid over-frequency (f>)
Ⅰ-Max-F. time
Stage Ⅰ Grid over-frequency (f>) tripping time
Ⅱ-Max-F. grid
Stage Ⅱ Grid over-frequency (f>>)
Ⅱ-Max-F. time
Stage Ⅱ Grid over-frequency (f>>) tripping time
Under-frequency protection
Min-F. prot
Ⅰ-Min-F. grid
Stage ⅠGrid under-frequency (f<)
Ⅰ-Min -F. time
Stage Ⅰ Grid under-frequency (f<) tripping time
Ⅱ-Min -F. grid
Stage Ⅱ Grid under-frequency (f<<)
Ⅱ-Min -F. time
Stage Ⅱ Grid under-frequency (f<<) tripping time
Confirm settings by pressing ENTER and enter the
“Setting confirmation” screen.
Check all above-mentioned parameter settings. Confirm
them by pressing ENTER. Cancel by pressing ESC and
reset.
When the Country or the Grid code or LVRT switch mode is changed,
the protective settings will be unavailable unless the inverter is
re-energized.
80
User Manual
10.12
10 Operation of LCD Display
Communication Parameters Setting
Main Screen(Press ENTER )→Menu screen(Press j×3)→Set-param(Press ENTER)→
Enter password(Press ENTER, Press j×3)→Com-param(Press ENTER)
Press h to move cursor right and Press j to set the
appropriate value. Confirm settings by Pressing
ENTER.
The range of communication address is 1...247.
10.13
Advanced Parameters Setting
Advanced parameters are designed for PV strings current abnormal condition
detection and arcing faults detection that can trigger the protective functions of the
inverter.
10.13.1 PVS Detect Settings
Main Screen(Press ENTER )→Menu screen(Press j×4)→Advanced Settings(Press
ENTER) → Enter password(Press ENTER) → Advanced Settings(Press ENTER) → PVS
Detect Settings
A password confirmation screen will occur. Press h to
move cursor right and Press j to input the password
111111.
PVS Detect represents the PV strings current abnormal
conditions detection. Press ENTER to confirm.
Press j to select PVS Detect function settings. Press
ENTER to confirm the selection.
81
10 Operation of LCD Display
User Manual
When the PV inputs are changed, the corresponding “fault” state will
be shown on the main screen. You can perform the PVS Detect Reset
function to re-detect the PV input strings number.
10.13.2 AFD Settings
Main Screen(Press ENTER )→Menu screen(Press j×4)→Advanced Settings(Press
ENTER)→Enter password(Press ENTER)→Advanced Settings(Press j, Press ENTER)→
AFD Settings
A password confirmation screen will occur. Press h to
move cursor right and Press j to input the password
111111.
AFD Detect represents the arcing faults detection. Press
ENTER to confirm.
Press j to select AFD function settings. Press ENTER to
confirm the selection.
When you choose AFD Self-test, the results of the
self-test will show on the LCD screen.
If the self-test result is OK, the inverter will continue to
AC grid connection.
82
User Manual
10 Operation of LCD Display
If a potential problem on the AFD board is
detected, the self-test will result in fault.
83
11 Appendix
11.1
Technical Data
Parameters
Input Side Data
SG30KU
SG36KU
Max. PV input power
Max. input voltage
Startup voltage
Nominal input voltage
MPP voltage range
MPP voltage range for nominal power
No. of MPPT(s)
Max. number of PV strings per MPPT
Max. PV input current(DC1/DC2)
Max. input current for input connector
Short-circuit current of PV input
34100W
1000Vdc
300V
710V
280...950Vdc
480...850Vdc
2
5
33A*2
12A
60A*2
41000W
560...850Vdc
Output Side Data
Nominal AC output power
Max. AC output power(PF=1)
Max. AC output apparent power
Max. AC output current
Nominal AC voltage
AC voltage range
Number of Phases
Normal output frequency
Grid frequency range
30000W
36000W
33240W
39800W
33240VA
39800VA
40A
48A
480Vac
422...528Vac
3Ø/3W or 4W+Ground
60Hz
57...63Hz
THD
< 3 % (at nominal power)
DC current injection
<0.5%In
Power factor
>0.99 default value at nominal power
(adj. 0.8 overexcited...0.8 underexcited)
Protection
Anti-islanding protection
LVRT
AC short circuit protection
Leakage current protection
DC switch
DC fuse
84
Yes
Yes
Yes
Yes
Integrated
Integrated
Parameters
Overvoltage protection
AC switch
SG30KU
SG36KU
Type III surge arrester
(Optional Type II DIN rail surge arrester)
Optional
System data
Max. efficiency
CEC efficiency
Isolation method
Ingress protection rating
Night power consumption
Operating ambient temperature range
98.5%
98.0%
Transformerless
NEMA4X
<1W
-25...＋60℃ (>45℃ derating)
Display
Communication
DC connection type
AC connection type
-13…+140℉(>113℉ derating)
0...100%
Smart forced air cooling
4000m
(>3000m
derating)
13123ft(>9842ft derating)
Graphic LCD
RS485
Screw terminals
Spring clamp terminal
Certification
cCSAus
Safety and EMC Standard
UL 1741, IEEE 1547, IEEE1547.1,CSA C22.2
107.1-01-2001,FCC Part 15 Sub-part B
Class B Limits
Allowable relative humidity range
Cooling method
Max. operating altitude
Mechanical Data
Dimensions (W×H×D)
Mounting method
Weight
622×880×250mm
25" × 34.6" × 9.8"
Wall bracket or Floor bracket
65kg
85
11.2
Grid Over-/Under-voltage Parameter
Voltage(at PCC)
Trip time(s)
V＜50%
0.16
50%≤V＜88%(adjustable)
Adjustable 0.16 to 2
88%≤V≤110%(adjustable)
Normal operation
110%＜V＜120%
Adjustable 0.16 to 1
V＞120%
0.16
11.3
Grid Over-/Under-frequency Parameter
Frequency range(Hz)
Clearing time(s)
＞60.5
< {59.8-57.0}
(adjustable set point)
<57.0
0.16
11.4
86
P-Q Curve
Adjustable 0.16 to 300
0.16
11.5
Automatic Power Derating
In order to maintain safe inverter operation under adverse environmental
conditions or due to improper input voltages, the unit automatically reduces the
amount of power it feeds to the grid.
11.5.1 Temperature-related Power Derating
Operating parameters, such as input voltage, grid voltage and power available from
the photovoltaic arrays can affect the power derating caused by ambient or inverter
temperature. The following graph shows the automatic reduction in output power
in relation to ambient temperature.
87
11.5.2 Input Voltage-related Power Derating
The following graph shows the automatic reduction in output power when the
input voltage exceeds the threshold value.
88
11.6
Exclusion of Liability
The content of these documents is periodically checked and revised, please contact
us or check our website www.sungrowpower.com for the latest information.
Discrepancies cannot be excluded. No guarantee is made for the completeness of
these documents. Please contact our company or distributors to get the latest
version.
Guarantee or liability claims for damages of any kind are excluded if they are caused
by one or more of the followings:
y Inappropriate use or install of the product
y Installing or operating the product in an unintended environment
y Ignoring relevant safety regulations in the deployment location when installing
or operating the product
y Ignoring safety warnings and instructions contained in all documents relevant to
the product
y Installing or operating the product under incorrect safety or protection
conditions
y Altering the product or supplied software without authority
y The product faults due to operating attached or neighboring devices beyond
allowed limit values
y Damages caused by irresistible natural environment
The use of supplied software produced by Sungrow Power Supply Co., Ltd. is subject
to the following conditions:
y Sungrow Power Supply Co., Ltd. rejects any liability for direct or indirect damages
arising from the use of the SolarInfo software. This also applies to the provision or
non-provision of support activities.
y Using the SolarInfo software for commercial purposes is prohibited.
y Decompiling, decoding or destroying the original program, including SolarInfo
software and the embedded software, is prohibited.
89
11.7
About Us
Sungrow power supply is a China-leading manufacturer of various power electronics
products for renewable energy generation systems. Our products include converters,
inverters, battery chargers and other power supplies for distributable generation
system in both grid-connected and stand-alone applications. The power rating of
Sungrow products covers from hundred watt to mega-watt systems.
The vision of Sungrow is to help our customers acquire stable and clean power with
minimum cost, maximum reliability and enhanced safety.
Contact Information
Should you have any question about this product, please contact us.
Company:
Website:
Email:
Address:
Zip:
Telephone:
Fax:
Sungrow Power Supply Co., Ltd.
www.sungrowpower.com
info@sungrow.cn, service@sungrow.cn
No.1699 Xiyou Rd., New & High Technology Industrial
Development Zone, Hefei, P. R. China.
230088
+86 551 6532 7834, +86 551 6532 7845
+86 551 6532 7856
Canada
Add:
895 Edgeley Blvd, Vaughan, ON L4K 4V9
Toll-Free Inquiry:
+1 855 760 8618
Tel:
Fax:
Business:
After-Sales
Website:
+1 905 760 8618
+1 905 760 1158
info@sungrow.ca,
service@sungrow.ca
www.sungrow.ca
U.S.A
Add:
47751 Fremont Blvd., Fremont, CA 94538
Tel:
+1 510 324 6125
Mobile:
Email:
Website:
+1 905 760 1158
sales@sungrow.ca
www.sungrow.ca
90
Sungrow Power Supply Co., Ltd.
Add: No.1699 Xiyou Rd.,New & High Technology Industrial Development Zone, 230088,Hefei, P. R. China.
Post Zip: 230088
Web: www.sungrowpower.com
Tel: +86 551 6532 7834/6532 7845
E-mail: info@sungrow.cn
Fax: +86 551 6532 7856
Specifications are subject to changes without advance notice.